| 用500型三用表直流电压10V档，黑表笔接LM7805外壳，红表笔测电解EC5对地+6V电压偏低（正常为+7V），多为T1开关dianyuan电源高频变压器损坏，更换高频变压器T1后dianyuan电源电压恢复正常。当通电测试机子时，又出现 |
|Archiver|手机版|家电维修论坛
( 蜀ICP备19011473号-4 川公网安备51102502000164号 )
GMT+8, 2025-7-18 23:17 , Processed in 0.128758 second(s), 18 queries .
Powered by Discuz! X3.5
© 2001-2025 Discuz! Team.
